Windows calculator is annoying me. I've frequently have to switch to and from programmer. It's not powerful enough to do anything useful, but can convert betwee

Windows calculator is annoying me. I've frequently have to switch to and from programmer. It's not powerful enough to do anything useful, but can convert between number systems. But any switch clears the current input. And certainly doesn't move data over if I've already did a calculation or (, more often then I'd like to admit,) already inputted a number before noticing what mode I'm in. Another issue is hotkeys... sure, there is a way to switch between planes by keyboard. But the dumbed-down interface for mobile just doesn't provide any way to tell you.